Rapid subsidence thermoforming mold and thermoforming method of aluminum alloy sections

A technology of aluminum alloy profiles and hot forming, which is applied in the direction of forming tools, manufacturing tools, metal processing equipment, etc., can solve the problems of low efficiency of production process, difficult heating, low heating efficiency, etc., to improve energy utilization rate and shorten the forming cycle , Heating efficiency improvement effect

Inactive Publication Date: 2013-07-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the low heating efficiency of existing aluminum alloy profile sagging thermoforming, especially the difficulty in local heating of large aluminum alloy profiles, which leads to low efficiency of the entire production process and is not suitable for mass production.

Method used

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  • Rapid subsidence thermoforming mold and thermoforming method of aluminum alloy sections
  • Rapid subsidence thermoforming mold and thermoforming method of aluminum alloy sections

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specific Embodiment approach 1

[0018] Embodiment 1: The current-assisted rapid sag thermoforming mold for aluminum alloy profiles in this embodiment includes a punch 1, a die 2, two contact electrodes 3, a contact thermocouple 4, a pulse power supply 5 and a PID control system 6. The middle part of the punch 1 protrudes, and the part of the die 2 corresponding to the protrusion of the middle part of the punch 1 has a depression. One contact electrode 3 is fixed on the die 2 through an insulating structure 8, and the other contact electrode 3 is fixed on the die 2 through the insulating structure 8, and the two contact electrodes 3 are symmetrically arranged relative to the depression, the signal input end of the PID control system 6 is connected to the signal output end of the contact thermocouple 4, and the output end is connected to the pulse power supply 5 The controlled end is to control the output current value, the positive pole and the negative pole of the pulse power supply 5 are respectively connect...

specific Embodiment approach 2

[0021] Embodiment 2: This embodiment differs from Embodiment 1 in that: the punch 1 and the die 2 are T-shaped, Z-shaped, ∟-shaped or I-shaped. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0022] Specific implementation mode three: The rapid sag thermoforming of aluminum alloy profiles in this implementation mode is carried out according to the following steps:

[0023] 1. Put the area to be processed of the profile blank 7 into the processing area 9 of the aluminum alloy profile current-assisted rapid sinking thermoforming mold; 2. Control the contact electrode 3 with a current of 3000-100000A and a voltage of 3-7V through the pulse power supply 5 Under certain conditions, the area to be processed of the profile blank 7 is heated and pressed. During the heating and pressure process, the temperature of the processing area 9 is controlled by the PID control system 6 and the contact thermocouple 4, so that the temperature of the processing area 9 is maintained at 100 ℃~350℃, carry out the mold closing of the concave mold 2 and the convex mold 1 to realize the local deformation of the profile, that is to complete the rapid sag thermoforming of the aluminum alloy pro...

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Abstract

The invention relates to a rapid subsidence thermoforming mold and a thermoforming method of an aluminum alloy section and in particular relates to the thermoforming mold and the thermoforming method of the aluminum alloy section. The invention aims at solving the problems that the heating efficiency of the existing subsidence thermoforming of the aluminum alloy sections is low, the entire production process is low in efficiency and not suitable for mass production due to the fact that local heating of the large aluminum alloy section is difficult. The rapid subsidence thermoforming mold comprises a male mold, a female mold, a contact-type electrode, a contract-type thermocouple, a pulsed power supply, a PID control system and a section blank. The rapid subsidence thermoforming method comprises the following steps of: placing the aluminum alloy section on the mold, carrying out rapid local heating on the section by virtue of pulse current assisted with self-block heating, and carrying out subsidence thermoforming to form a product with a desired shape by virtue of pressure. By utilizing the rapid subsidence thermoforming method, the heating efficiency can be improved by 300%-500%, the thermoforming cycle is shortened to 10-50 seconds, and the energy utilization rate can be improved by 200%-400%. The rapid subsidence thermoforming mold and the rapid subsidence thermoforming method are applied to the aerospace field.

Description

technical field [0001] The invention relates to a thermoforming die and method for aluminum alloy profiles. Background technique [0002] As an alloy with low density, high elastic modulus, high specific strength and specific stiffness, aluminum alloy has broad application prospects in the aerospace field and is one of the most competitive lightweight and high-strength structural materials in the aerospace industry. Aluminum alloy profiles have been widely used in the aerospace field, such as aircraft wing skeletons, etc. Therefore, the forming of aluminum alloy profiles has become a key technology, and sag thermoforming has been widely used in the local forming of aluminum alloy profiles. [0003] Sink thermoforming is a processing method in which parts and molds are heated to a certain temperature to carry out press forming and sinking. It is mainly used for parts made of materials with high strength, stress concentration, and strong sensitivity. The advantage of this pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D37/16B21D37/10B21D22/06
Inventor 卢振蒋少松
Owner HARBIN INST OF TECH
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